Calendar spreads need 2 expiry atleast. Finnifty has only 1 expiry that too gets good liquidity only after Friday. Wednesday and Thursday for current expiry itself has liquidity issues. So we can't think of liquidity in next expiry.
Ltp will be 0 in all strikes, volumes will be zero, oi will again be 0
However, as this instrument gets older we may see more liquidity and present situation can change with time.
You can trade and make good daily profit using our bank nifty intraday tips today and remember that we trade less but trade accurately.